Flexor And Extensor

Flexor and Extensor Muscles

Topic: Flexor and Extensor Muscles

Question: Which muscles are stronger, flexor or extensor muscles?

Hypothesis: I think that the muscles are going to perform about the same. They're going to perform about the same because whenever you flex, you extend, and vice versa. Therefore, they get about the same amount of "exercise" no matter what you're doing.

Procedure:

1. Get into groups
2. Have one person stand up straight with his / her back against a wall.
3. Have that person hold the weights in his / her dominant hand
4. In a "curling" motion, have the student raise and lower the weights until his / her arms get tired.
5. Repeat steps 2-4 for each member of the group.
6. Record the data for each member of the group.
7. Have the first person stand as straight as possible near a wall.
8. Have the student hold the weights with his / her dominant arm bent near the ear.
9. In a motion that mimics throwing, have the student extend the weights above his / her head until the dominant arm gets tired.
10. Repeat steps 7-9 for each member of the group.
11. Record the data for each member of the group.

Data:

Group Member Boy	Flexor Muscle 150	Extensor Muscle 37
Girl	27	30
Girl	23	6
Girl	60	35
Girl	30	70
Girl	45	30

Conclusion: My hypothesis was that the flexor and extensor muscles would perform at about the same strength. I was incorrect. As you can see in my chart, the average amount of flexor exercises that a male could do was about 30, while the female was about 27. The male extensor muscle could perform about 25 exercises while the female performed about 20. Therefore, the flexor not only performed better than the extensor overall, but the males performed better than the females.